Product Description The OnTheBallBowling (OTBB) Celtic Butterfly Bowling Ball is a custom-made, polyester bowling ball featuring a vibrant Celtic butterfly design by fantasy artist Brigid Ashwood, blending intricate Celtic totems with modern appeal. Part of the OTBB Artist collection, this USBC-approved ball has a plastic coverstock and a traditional 3-piece symmetric core, delivering a straight ball reaction with low flare potential, making it perfect for recreational bowlers, straight-throwers, or competitive bowlers targeting spares on any lane condition. Available in 8, 10, 12, 14, 15, and 16 lbs.